LXR linux/block/blk-mq-sched.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef BLK_MQ_SCHED_H
   3#define BLK_MQ_SCHED_H
   4
   5#include "blk-mq.h"
   6#include "blk-mq-tag.h"
   7
   8void blk_mq_sched_free_hctx_data(struct request_queue *q,
   9                                 void (*exit)(struct blk_mq_hw_ctx *));
  10
  11void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);
  12
  13void blk_mq_sched_request_inserted(struct request *rq);
  14bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
  15                                struct request **merged_request);
  16bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
  17bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
  18void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
  19
  20void blk_mq_sched_insert_request(struct request *rq, bool at_head,
  21                                 bool run_queue, bool async);
  22void blk_mq_sched_insert_requests(struct request_queue *q,
  23                                  struct blk_mq_ctx *ctx,
  24                                  struct list_head *list, bool run_queue_async);
  25
  26void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
  27
  28int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
  29void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
  30
  31int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
  32                           unsigned int hctx_idx);
  33void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
  34                            unsigned int hctx_idx);
  35
  36int blk_mq_sched_init(struct request_queue *q);
  37
  38static inline bool
  39blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
  40{
  41        if (blk_queue_nomerges(q) || !bio_mergeable(bio))
  42                return false;
  43
  44        return __blk_mq_sched_bio_merge(q, bio);
  45}
  46
  47static inline bool
  48blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
  49                         struct bio *bio)
  50{
  51        struct elevator_queue *e = q->elevator;
  52
  53        if (e && e->type->ops.mq.allow_merge)
  54                return e->type->ops.mq.allow_merge(q, rq, bio);
  55
  56        return true;
  57}
  58
  59static inline void blk_mq_sched_completed_request(struct request *rq)
  60{
  61        struct elevator_queue *e = rq->q->elevator;
  62
  63        if (e && e->type->ops.mq.completed_request)
  64                e->type->ops.mq.completed_request(rq);
  65}
  66
  67static inline void blk_mq_sched_started_request(struct request *rq)
  68{
  69        struct request_queue *q = rq->q;
  70        struct elevator_queue *e = q->elevator;
  71
  72        if (e && e->type->ops.mq.started_request)
  73                e->type->ops.mq.started_request(rq);
  74}
  75
  76static inline void blk_mq_sched_requeue_request(struct request *rq)
  77{
  78        struct request_queue *q = rq->q;
  79        struct elevator_queue *e = q->elevator;
  80
  81        if (e && e->type->ops.mq.requeue_request)
  82                e->type->ops.mq.requeue_request(rq);
  83}
  84
  85static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
  86{
  87        struct elevator_queue *e = hctx->queue->elevator;
  88
  89        if (e && e->type->ops.mq.has_work)
  90                return e->type->ops.mq.has_work(hctx);
  91
  92        return false;
  93}
  94
  95static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
  96{
  97        return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
  98}
  99
 100#endif
 101